Over charging 91 D350 in England

Discussion in '1st Generation Cummins' started by 75dually, Jan 20, 2015.

  1. 75dually

    75dually Registered User

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    Hey
    Greetings from the UK
    Just got my 1st Dodge truck 1991 D350 Cummins, only had it a couple of weeks.
    I noticed today that over idle the lights were pulsing and a lot brighter than before,
    then i noticed the battery was hissing, I put a multimeter on the battery and over idle
    I have 19v, I can't see any regulator on the bulkhead so I presume the alternator is
    computer controlled?? anything I need to check?
     
  2. 79jasper

    79jasper Chickenhawk

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    Regulator could be built into the alternator.

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  3. 75dually

    75dually Registered User

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    From searching on here i've not seen a Dodge Alternator with a built in regulator
     
  4. 79jasper

    79jasper Chickenhawk

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  5. 75dually

    75dually Registered User

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    According to the vin decoders it's 1992 but according to the door jamb plate it 11-91 c not sure what the c is for
    No regulator on the firewall so i'm guessing it's in the computer, I'll see if I can find an external regulator tomorrow,
    parts not easy to find over here
     
  6. 79jasper

    79jasper Chickenhawk

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    Then I bet it's in the computer.

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  7. 75dually

    75dually Registered User

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    Well looks like some PO has installed an after market euro regulator to the inner fender,
    earth was bad on this plus it was rattling loose on the screws, cleaned the earth and fastened
    the reg to the body and my truck is not 14.8v :) still has a slight pulsing thing though but at least it's
    not cooking my battery any more
     
  8. towcat

    towcat Administrator Staff Member

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    start simple. make sure your grounds and clean, DRY and tight.
    if you can post a pic of the alternator.
     
  9. 75dually

    75dually Registered User

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    Right finally got back on it today, put my digital volt meter on the battery and the volts are going 13v to 16v up and down, faster you rev the motor the faster it fluctuates, the PO seems to have picked up a key live from the grid heater relay, this is a bad connection i need to sort View attachment 54760
     
    Last edited: Jan 28, 2015
  10. 75dually

    75dually Registered User

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  11. 75dually

    75dually Registered User

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